Question

insert 5 rational numbers between -2and -1

Answer 1

Rational no between.. Any two no (a and b) is a+b/2....

For example
The rational number between a and b is (a + b)/2
Hence rational number between 1 and 2 is (1+2)/2 = 3/2 = 1.5
Rational number between 1 and 3/2 is [1+(3/2)]/2 = 5/4 = 1.25

Answer 2

-2 and -1
-2(6) and -1(6)
-12 and -6
-11 ,-10 ,-9 ,-8 ,-7 are the five rational numbers between -2 and -1